Title :
Hardware-Efficient Phase Estimation for Digital Coherent Transmission With Star Constellation QAM
Author :
Hoffmann, Sebastian ; Rdehoff, Christian Wö ; Al-Bermani, Ali ; El-Darawy, Mohamed ; Puntsri, Kidsanapong ; Ckert, Ulrich Rü ; Noe, Reinhold
Author_Institution :
Univ. of Paderborn, Paderborn, Germany
fDate :
4/1/2010 12:00:00 AM
Abstract :
In order to build optical transmission systems for 100 Gb/s and above on a single wavelength division multiplexing channel, transition from quadrature phase-shift keying (QPSK) to higher quadrature amplitude modulation (QAM) formats seems to be inevitable. Instead of the usual square constellation QAM, we focus on regular star constellation QAM formats and present a hardware-efficient phase-estimation algorithm that is suitable for all regular star constellations, together with preliminary simulation results.
Keywords :
optical modulation; optical receivers; phase estimation; quadrature amplitude modulation; quadrature phase shift keying; wavelength division multiplexing; bit rate 100 Gbit/s; digital coherent transmission; optical receivers; optical transmission systems; phase estimation; quadrature amplitude modulation; quadrature phase-shift keying; star constellation QAM; wavelength division multiplexing channel; Digital signal processing; Optical fiber polarization; Optical modulation; Optical receivers; Phase estimation; Phase noise; Phase shift keying; Quadrature amplitude modulation; Quadrature phase shift keying; Signal processing algorithms; Fiber optics systems; homodyning;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2010.2044784
